Table 3.

Characteristics of 162 Children With a Second Entamoeba histolytica Infection

Characteristic	Diarrhea	Colonizationa
Overall	28/162 (17.3)	134/162 (82.7)
Age at infection, d, median (range)	430 (153–718)	493 (94–719)
E. histolytica IgA positive–stool	8/28 (28.6)	17/134 (12.7)
Had third infection
Overall	11/28 (39.3)	43/134 (32.1)
Symptomatic, no.	1	8
Asymptomatic (colonization), no.	10	35

Data are no. of children with the specified characteristic/no. of children in the cohort of interest (%), unless otherwise indicated. Children were considered to be infected with E. histolytica if they had a diarrhea or surveillance stool specimen that tested positive by quantitative polymerase chain reaction and were negative for E. histolytica during the previous 60 days.

Abbreviation: IgA, immunoglobulin A.

^a Defined as an E. histolytica–positive stool specimen collected from an asymptomatic child during monthly surveillance.